High-power-density UPS lithium battery system and power supply method

Abstract

The invention provides a high-power-density UPS lithium battery system and a power supply method, and the method comprises the steps: determining first weight information according to first electric quantity information, determining second weight information according to first cycle index information, and determining third weight information according to first temperature information; then, according to the first weight information, the second weight information and the third weight information, sorting the lithium battery cells of the UPS to obtain a first battery cell sequence; and finally, first quantity information is determined according to the first voltage information, and the battery cells are driven to supply power according to the first quantity information and the first battery cell sequence. According to the invention, the power supply condition of each lithium battery cell is adjusted according to the state of the UPS lithium battery cell, and the service life of the lithium battery cell is prolonged and the use safety of the UPS is improved under the condition of ensuring the power supply requirement of the UPS.

Description

Technical Field

[0001] The present invention relates to the field of electronic power supplies, and more specifically, to a high power density UPS lithium battery system and a power supply method. Background Art

[0002] As a core IT equipment, UPS (Uninterruptible Power Supply) plays a vital role in ensuring the power supply security required for the normal operation of the data center. When the power grid encounters various faults, UPS outputs high-quality power through the configured battery and AC inverter to avoid data loss or task interruption caused by power outage.

[0003] AI computing center servers use a large number of high-performance GPUs, TPUs and other dedicated chips. Their power consumption may be 2-3 times higher than that of traditional servers, and they have higher requirements for the stability, safety and environmental control of power supply. Traditional UPS uses lead-acid batteries, which have problems such as short cycle life, large size and weight, and high maintenance costs in data center scenarios. Therefore, there is an urgent need for a high-power density UPS lithium battery technology that can provide greater output power while improving safety and cost-effectiveness. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a high power density UPS lithium battery system and power supply method. First, first weight information can be determined according to first power information, second weight information can be determined according to first cycle number information, and third weight information can be determined according to the first temperature information; then, according to the first weight information, the second weight information and the third weight information, the lithium battery cells of the UPS are sorted to obtain a first battery cell sequence; finally, first quantity information is determined according to the first voltage information, and then the battery cells are driven to supply power according to the first quantity information and the first battery cell sequence; the present invention adjusts the power supply status of each lithium battery cell according to the status of the UPS lithium battery cell, and prolongs the service life of the lithium battery cell and improves the safety of UPS use while ensuring the power supply demand of the UPS.

[0005] A first aspect of the present invention provides a high power density UPS lithium battery system, the system comprising: Processor, health value analysis module, power switch module; The processor is used to sort the power supply priority states of the lithium battery cells through the health value analysis module, and then switch the power supply switch module of each lithium battery cell according to the power supply quantity of the lithium battery cells.

[0006] In this solution, the health value analysis module also includes: The power collection unit is used to collect the power value of each lithium battery cell; The cycle number recording unit is used to record the number of charge and discharge cycles of each lithium battery cell; The temperature collection unit is used to collect the temperature value of each lithium battery cell; The health value calculation unit is used to calculate the health value of each lithium battery cell.

[0007] In this solution, the power switch module is specifically: It is used to control the power supply state of each lithium battery cell and switch to the on state or the off state according to the control instruction of the processor.

[0008] A second aspect of the present invention provides a high power density UPS power supply method, the method comprising: Acquire first power information; Determining first weight information according to the first power information; Get the first cycle number information; Determining second weight information according to the first cycle number information; Acquiring first temperature information; determining third weight information according to the first temperature information; Obtaining a first battery cell sequence according to the first weight information, the second weight information and the third weight information; Acquiring first voltage information; determining first quantity information according to the first voltage information; The battery cells are driven to supply power according to the first quantity information and the first battery cell sequence.

[0009] In this solution, the first weight information is determined according to the first power information, specifically: Obtaining a first power sequence according to the first power information in descending order; Determining a first weight threshold according to a minimum value of the first power sequence and a preset power segmentation rule; According to the first power sequence and the preset power segmentation rule, first weight information is obtained according to the first weight threshold.

[0010] In this solution, the second weight information is determined according to the first cycle number information, specifically: Determine whether the first cycle number information exceeds a preset first cycle number threshold; If yes, setting the second weight information according to a preset second weight threshold; If not, the second weight information is set according to the first cycle number information.

[0011] In this solution, the third weight information is determined according to the first temperature information, specifically: Determining whether the first temperature information is lower than a preset first temperature threshold; If yes, setting the third weight information according to a preset third weight threshold; If not, determining whether the first temperature information exceeds a preset second temperature threshold; If yes, setting the third weight information according to a preset fourth weight threshold; If not, the third weight information is obtained according to the preset temperature weight corresponding table.

[0012] In this solution, the first cell sequence is obtained according to the first weight information, the second weight information and the third weight information, specifically: Obtaining first health value information according to the first weight information, the second weight information and the third weight information and in accordance with a preset first health value relationship formula; According to the first health value information, a first health value sequence is obtained in ascending order; A first battery cell sequence is obtained according to the first health value sequence.

[0013] In this solution, the driving of the battery cell to supply power according to the first quantity information and the first battery cell sequence is specifically: According to the first quantity information, and in accordance with the arrangement order of the first battery cell sequence, the first power supply mark information is sequentially set; Determine whether the first power supply mark information is a power supply state; If yes, the power switch of the corresponding battery cell is switched to the on state; If not, the power switch of the corresponding battery cell is switched to the off state.

[0014] This plan also includes: Determining whether the first temperature information exceeds a preset over-temperature threshold; If so, the first power supply mark information is set to a disabled state, and the power supply switch of the corresponding battery cell is switched to an off state.

[0015] The present invention provides a high power density UPS lithium battery system and power supply method. First, first weight information is determined according to first power information, second weight information is determined according to first cycle number information, and third weight information is determined according to the first temperature information; then, lithium battery cells of the UPS are sorted according to the first weight information, the second weight information and the third weight information to obtain a first battery cell sequence; finally, first quantity information is determined according to first voltage information, and then the battery cells are driven to supply power according to the first quantity information and the first battery cell sequence; the present invention adjusts the power supply status of each lithium battery cell according to the status of the UPS lithium battery cell, and prolongs the service life of the lithium battery cell and improves the use safety of the UPS while ensuring the power supply demand of the UPS. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope.

[0017] Figure 1 A block diagram of a high power density UPS lithium battery system of the present invention is shown; Figure 2 A flow chart of a high power density UPS power supply method according to the present invention is shown; Figure 3 A flowchart of determining first weight information provided by this embodiment is shown; Figure 4 A flowchart of determining the second weight information provided by this embodiment is shown; Figure 5 A flow chart for determining the third weight information provided by this embodiment is shown. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention are explicitly defined in this way.

[0020] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one", "an" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The steps before or after the method of the embodiment of the present invention are not necessarily carried out in order. On the contrary, various steps can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or a step or several steps can be removed from these processes.

[0021] In addition, the functional modules in the various embodiments of the present invention may be integrated together to form an independent part, or each module may exist independently, or two or more modules may be integrated to form an independent part.

[0022] Figure 1 A flow chart of a high power density UPS power supply method of the present invention is shown.

[0023] like Figure 1 As shown, the first aspect of the present invention discloses a high power density UPS lithium battery system, the system comprising: Processor 101, health value analysis module 102, power switch module 103; The processor is used to sort the power supply priority states of the lithium battery cells through the health value analysis module, and then switch the power supply switch module of each lithium battery cell according to the power supply quantity of the lithium battery cells.

[0024] It should be noted that the processor, as the data processing center and control center of the UPS lithium battery system, first sorts the lithium battery cells according to the health value of each lithium battery cell output by the health value analysis module. Then, according to the number of lithium battery cells required to meet the power supply demand, the power supply switch module is switched in sequence according to the sorted lithium battery cells, so that the lithium battery cells are in the power supply on state or off state.

[0025] According to an embodiment of the present invention, the health value analysis module further includes: The power collection unit is used to collect the power value of each lithium battery cell; The cycle number recording unit is used to record the number of charge and discharge cycles of each lithium battery cell; The temperature collection unit is used to collect the temperature value of each lithium battery cell; The health value calculation unit is used to calculate the health value of each lithium battery cell.

[0026] It should be noted that the health value calculation unit determines the first weight according to the power value collected by the power collection unit, determines the second weight according to the number of charge and discharge cycles recorded by the cycle number recording unit, and determines the third weight according to the temperature value collected by the temperature collection unit. Then, the health value meter obtains the health value of the lithium battery cell according to the first weight, the second weight and the third weight, according to the set health value relationship.

[0027] According to an embodiment of the present invention, the power switch module is specifically: It is used to control the power supply state of each lithium battery cell and switch to the on state or the off state according to the control instruction of the processor.

[0028] It should be noted that the power switch module obtains the control instruction sent by the processor and the power supply mark information in the control instruction. When the power supply mark information is the power supply output state, it switches to the on state to make the corresponding lithium battery cell output power; otherwise, it switches to the off state to stop the corresponding lithium battery cell from outputting power.

[0029] Figure 2 A block diagram of a high power density UPS lithium battery system of the present invention is shown.

[0030] like Figure 2 As shown, the second aspect of the present invention discloses a high power density UPS power supply method, the method comprising: S202, obtaining first power information; S204, determining first weight information according to the first power information; S206, obtaining first cycle number information; S208, determining second weight information according to the first cycle number information; S210, obtaining first temperature information; S212, determining third weight information according to the first temperature information; S214, obtaining a first battery cell sequence according to the first weight information, the second weight information and the third weight information; S216, obtaining first voltage information; S218, determining first quantity information according to the first voltage information; S220: Drive the battery cells to supply power according to the first quantity information and the first battery cell sequence.

[0031] It should be noted that the first power information is the power value of each lithium battery cell; the first weight information is one of the weight parameters for calculating the health value of the lithium battery cell; the first cycle number information is the number of charge and discharge cycles of each lithium battery cell; the second weight information is one of the weight parameters for calculating the health value of the lithium battery cell; the first temperature information obtained is the temperature value of each lithium battery cell; the third weight information is one of the weight parameters for calculating the health value of the lithium battery cell; the first battery cell sequence is a sequence arranged in ascending or descending order according to the health values ​​of the lithium battery cells; the first voltage information is the power supply voltage required by the load; the first quantity information is the number of lithium battery cells that need to be output when the UPS is powered.

[0032] In this embodiment, the health value of the lithium battery cell is evaluated according to the information such as the power, charge and discharge cycle number and temperature of the lithium battery cell, and the lithium battery cell is sorted according to the health value, and then the corresponding number of lithium battery cells are driven according to the power supply demand to realize power supply. In practical applications, a redundant power supply solution is usually adopted; for example, when 120 strings of lithium battery cells can meet the power supply demand of UPS, 136 strings of lithium battery cells will actually be used to form UPS, and the redundant design is adopted to improve the fault tolerance of UPS; therefore, by balancing the power supply working state of each lithium battery cell, the output power supply of each lithium battery cell is controlled while ensuring the power supply demand of UPS, so as to achieve the effect of extending the service life of the lithium battery cell. As an implementation method, first, according to the first power information, the first weight information is determined; according to the first cycle number information, the second weight information is determined; according to the first temperature information, the third weight information is determined. Then, according to the first weight information, the second weight information and the third weight information, according to the preset health value calculation method, the health state of each lithium battery cell is obtained, which is used to sort the lithium battery cells of UPS to obtain the first battery cell sequence. Finally, the number of lithium battery cells that need to be switched to the power output state is obtained according to the required power supply voltage, and then the corresponding number of lithium battery cells are driven in sequence according to the first battery cell sequence to meet the power supply demand.

[0033] Figure 3 A flow chart for determining first weight information provided by this embodiment is shown.

[0034] According to an embodiment of the present invention, Figure 3 As shown, the first weight information is determined according to the first power information, specifically: S302, obtaining a first power sequence according to the first power information in descending order; S304, determining a first weight threshold according to the minimum value of the first power sequence and a preset power segmentation rule; S306: Obtain first weight information according to the first power sequence and a preset power segmentation rule and the first weight threshold.

[0035] It should be noted that, in this embodiment, the power segmentation is performed according to the preset power segmentation rules. As an implementation method, the segmentation is: 93%-100%, 85%-93%, 70%-85%, 50%-70%, 20%-50% and 20%-0%. First, according to the power of each lithium battery cell, a first power sequence is obtained. Then, according to the minimum value in the first power sequence, the first weight threshold is determined. For example, if the minimum value of the lithium battery cell in the first power sequence is 83%, then the segment to which it belongs is the third segment. At this time, the first weight threshold is 3. Finally, the first weight information of each lithium battery cell is determined according to the power segmentation rule and the first weight threshold; as an implementation method, the weight is in a segment-increasing manner, that is, when the power is in the range of 93%-100%, the first weight information is 1, when the power is in the range of 85%-93%, the first weight information is 2, and when the power is in the range of 70%-85%, the first weight information is 3; as another implementation method, the weight is in a segment-decreasing manner, that is, when the power is in the range of 93%-100%, the first weight information is 3, when the power is in the range of 85%-93%, the first weight information is 2, and when the power is in the range of 70%-85%, the first weight information is 1.

[0036] Figure 4 A flow chart for determining the second weight information provided by this embodiment is shown.

[0037] According to an embodiment of the present invention, Figure 4 As shown, the second weight information is determined according to the first cycle number information, specifically: S402, determining whether the first cycle number information exceeds a preset first cycle number threshold; S404: If yes, setting the second weight information according to a preset second weight threshold; S406: If not, setting the second weight information according to the first cycle number information.

[0038] It should be noted that when a lithium battery cell completes a full charge and discharge, it is called a charge and discharge cycle; due to the physical characteristics of the lithium battery cell, the higher the number of charge and discharge cycles, the shorter its remaining service life. In this embodiment, the second weight information is determined based on the first cycle number information to calculate the health value of the lithium battery cell. First, determine whether the first cycle number information exceeds the preset first cycle number threshold; if so, it means that the number of charge and discharge cycles has exceeded the set number of uses, and the lithium battery cell has a certain degree of natural loss. Therefore, the second weight information is set according to the set second weight threshold; if not, it means that the lithium battery cell is in a normal state. At this time, the second weight information is set according to the number of charge and discharge cycles.

[0039] Figure 5 A flow chart for determining the third weight information provided by this embodiment is shown.

[0040] According to an embodiment of the present invention, Figure 5 As shown, the third weight information is determined according to the first temperature information, specifically: S502, determining whether the first temperature information is lower than a preset first temperature threshold; S504: If yes, setting the third weight information according to a preset third weight threshold; S506, if not, determining whether the first temperature information exceeds a preset second temperature threshold; S508: If yes, setting the third weight information according to a preset fourth weight threshold; S510: If not, obtain third weight information according to a preset temperature weight corresponding table.

[0041] It should be noted that, in the present embodiment, the third weight information is determined according to the temperature value of the lithium battery cell to calculate the health value; since the lithium battery cell generates heat when it is in the power supply state, if the temperature value of the lithium battery cell is too high, there is a risk of burning and damage. In the present embodiment, when the temperature value of the lithium battery cell is lower than the preset first temperature threshold, it means that the temperature of the lithium battery cell is at a safe temperature. Therefore, the third weight information is set according to the preset third weight threshold. When the temperature value of the lithium battery cell is higher than the preset second temperature threshold, it means that the temperature of the lithium battery cell is too high. If the power supply operation is continuously performed, there is a risk of overheating. Therefore, the third weight information is set according to the preset fourth weight threshold. When the temperature value of the lithium battery cell is within the range of the first temperature threshold and the second temperature threshold, at this time, the preset temperature weight correspondence table is searched to obtain the third weight information.

[0042] According to an embodiment of the present invention, obtaining a first cell sequence according to the first weight information, the second weight information and the third weight information is specifically: Obtaining first health value information according to the first weight information, the second weight information and the third weight information and in accordance with a preset first health value relationship formula; According to the first health value information, a first health value sequence is obtained in ascending order; A first battery cell sequence is obtained according to the first health value sequence.

[0043] It should be noted that, in this embodiment, according to the first weight information, the second weight information and the third weight information, the health value score of each lithium battery cell is calculated according to the preset health value calculation formula; wherein, the health value indicates the goodness of the state of the lithium battery cell. As an implementation method, the lower the health value, the better the state of the lithium battery cell; as another implementation method, the higher the health value, the better the state of the lithium battery cell. Then, the health values ​​of the lithium battery cells are arranged in ascending order to obtain the first health sequence, which is used to confirm the first battery cell sequence. In other words, the arrangement order of the first battery cell sequence indicates the arrangement order of the goodness of the state of the lithium battery cells.

[0044] According to an embodiment of the present invention, driving the battery cell to supply power according to the first quantity information and the first battery cell sequence is specifically: According to the first quantity information, and in accordance with the arrangement order of the first battery cell sequence, the first power supply mark information is sequentially set; Determine whether the first power supply mark information is a power supply state; If yes, the power switch of the corresponding battery cell is switched to the on state; If not, the power switch of the corresponding battery cell is switched to the off state.

[0045] It should be noted that, in this embodiment, according to the number of lithium battery cells that perform power supply requirements, the power supply flag information of each lithium battery cell is set in sequence according to the arrangement order of the first battery cell sequence; wherein the flag information is a parameter for setting the working state of the lithium battery cell. It is determined whether the first power supply flag information is the power supply state; if so, it means that the lithium battery cell needs to output power, and its power supply switch is switched to the on state; if not, it means that the lithium battery cell does not need to output power, and its power supply switch is switched to the off state.

[0046] According to an embodiment of the present invention, it also includes: Determining whether the first temperature information exceeds a preset over-temperature threshold; If so, the first power supply mark information is set to a disabled state, and the power supply switch of the corresponding battery cell is switched to an off state.

[0047] It should be noted that in this embodiment, an over-temperature protection mechanism is provided. When the temperature of the lithium battery cell exceeds the preset over-temperature threshold, its first power supply flag information is set to a disabled state, indicating that the current lithium battery cell is prohibited from outputting electrical energy as a power source. This avoids the battery cell from burning or even UPS damage due to continuous temperature rise during power supply, thereby improving the safety of UPS use.

[0048] It is worth mentioning that it also includes: Obtain the cell sequence record, calculate the average of the sorting according to the preset second quantity information, and obtain the first row number information; Obtaining a first row number sequence according to the first row number information; According to the first row number sequence, obtaining first row number mean information; Calculate the deviation ratio of the first row number information and the first row number mean information to obtain first deviation ratio information; Determining whether the first deviation ratio information is greater than a preset deviation ratio threshold; If so, a first maintenance instruction is sent to the background according to the first deviation ratio information.

[0049] It should be noted that, in this embodiment, according to the sorting record of each lithium battery cell, the mean of the sorting is calculated to obtain the first row number information; that is, according to the sequence number of the lithium battery cell sorted each time the power is supplied, the mean is calculated to obtain the average row number value, for example, the sequence numbers of the lithium battery cell numbered 20 in the last five times are 5, 10, 8, 15, and 22, respectively, and its first row number information is 12. After the first row number information of all lithium battery cells are collected, the first row number sequence is obtained. Then, according to the first row number sequence, the mean is calculated to obtain the first row number mean information; then, according to the row number of each lithium battery cell and the row number mean, the difference is calculated, and the ratio of the above difference to the mean is calculated to obtain the first deviation ratio information. When the first deviation ratio information is greater than the preset deviation ratio threshold, it means that there is a large deviation between the health status of the current lithium battery cell and the health status of other lithium battery cells. At this time, according to the number of the current lithium battery cell and the corresponding first deviation ratio information, a first maintenance instruction is generated and sent to improve the efficiency of UPS maintenance.

[0050] It is worth mentioning that it also includes: Obtain power supply record information; Obtain second health value information according to the power supply number information and the power supply quantity information of the power supply record information; According to the second health value information, searching a preset relationship equation corresponding table to obtain a second health relationship equation; The first health value relationship equation is updated according to the second health relationship equation.

[0051] It should be noted that in this embodiment, based on the power supply record of the UPS, including but not limited to the number of power supply times, power supply amount and other information, the health value of the UPS, that is, the second health value information, is calculated according to the set relationship; wherein the second health value information also represents the aging condition of the UPS lithium battery cell. Then, according to the second health value information, the preset relationship correspondence table is searched to obtain the second health relationship to update the first health value relationship. This embodiment updates the first health value relationship according to the aging condition of the UPS lithium battery cell, so that the calculated health value of the lithium battery cell is more in line with the actual state.

[0052] The present invention provides a high power density UPS lithium battery system and power supply method. First, first weight information is determined according to first power information, second weight information is determined according to first cycle number information, and third weight information is determined according to the first temperature information; then, lithium battery cells of the UPS are sorted according to the first weight information, the second weight information and the third weight information to obtain a first battery cell sequence; finally, first quantity information is determined according to first voltage information, and then the battery cells are driven to supply power according to the first quantity information and the first battery cell sequence; the present invention adjusts the power supply status of each lithium battery cell according to the status of the UPS lithium battery cell, and prolongs the service life of the lithium battery cell and improves the use safety of the UPS while ensuring the power supply demand of the UPS.

[0053] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program codes.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high power density UPS lithium battery system, characterized in that: The system comprises: Processor, health value analysis module, power switch module; The processor is used to sort the power supply priority states of the lithium battery cells through the health value analysis module, and then switch the power supply switch module of each lithium battery cell according to the power supply quantity of the lithium battery cells.

2. A high power density UPS lithium battery system according to claim 1, characterized in that: The health value analysis module also includes: The power collection unit is used to collect the power value of each lithium battery cell; The cycle number recording unit is used to record the number of charge and discharge cycles of each lithium battery cell; The temperature collection unit is used to collect the temperature value of each lithium battery cell; The health value calculation unit is used to calculate the health value of each lithium battery cell.

3. A high power density UPS lithium battery system according to claim 1, characterized in that: The power switch module is specifically: It is used to control the power supply state of each lithium battery cell and switch to the on state or the off state according to the control instruction of the processor.

4. A high power density UPS power supply method, applied to a high power density UPS lithium battery system according to any one of claims 1 to 3, characterized in that: The method comprises: Acquire first power information; Determining first weight information according to the first power information; Get the first cycle number information; Determining second weight information according to the first cycle number information; Acquiring first temperature information; determining third weight information according to the first temperature information; Obtaining a first battery cell sequence according to the first weight information, the second weight information and the third weight information; Acquiring first voltage information; determining first quantity information according to the first voltage information; The battery cells are driven to supply power according to the first quantity information and the first battery cell sequence.

5. A high power density UPS power supply method according to claim 4, characterized in that: The determining the first weight information according to the first power information is specifically: Obtaining a first power sequence according to the first power information in descending order; Determining a first weight threshold according to a minimum value of the first power sequence and a preset power segmentation rule; According to the first power sequence and the preset power segmentation rule, first weight information is obtained according to the first weight threshold.

6. A high power density UPS power supply method according to claim 4, characterized in that: The determining of the second weight information according to the first cycle number information is specifically: Determine whether the first cycle number information exceeds a preset first cycle number threshold; If yes, setting the second weight information according to a preset second weight threshold; If not, the second weight information is set according to the first cycle number information.

7. A high power density UPS power supply method according to claim 4, characterized in that: The determining of the third weight information according to the first temperature information is specifically: Determining whether the first temperature information is lower than a preset first temperature threshold; If yes, setting the third weight information according to a preset third weight threshold; If not, determining whether the first temperature information exceeds a preset second temperature threshold; If yes, setting the third weight information according to a preset fourth weight threshold; If not, the third weight information is obtained according to the preset temperature weight corresponding table.

8. A high power density UPS power supply method according to claim 4, characterized in that: The obtaining of a first cell sequence according to the first weight information, the second weight information and the third weight information is specifically: Obtaining first health value information according to the first weight information, the second weight information and the third weight information and in accordance with a preset first health value relationship formula; According to the first health value information, a first health value sequence is obtained in ascending order; A first battery cell sequence is obtained according to the first health value sequence.

9. A high power density UPS power supply method according to claim 4, characterized in that: The driving the battery cell to supply power according to the first quantity information and the first battery cell sequence is specifically: According to the first quantity information, and in accordance with the arrangement order of the first battery cell sequence, the first power supply mark information is sequentially set; Determine whether the first power supply mark information is a power supply state; If yes, the power switch of the corresponding battery cell is switched to the on state; If not, the power switch of the corresponding battery cell is switched to the off state.

10. A high power density UPS power supply method according to claim 9, characterized in that: Also includes: Determining whether the first temperature information exceeds a preset over-temperature threshold; If so, the first power supply mark information is set to a disabled state, and the power supply switch of the corresponding battery cell is switched to an off state.

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